Shire



No Model.)

T. F. WELLS.

POWER WRENGH.

No. 410,129. Patented Aug. 271889.

WITNESSES.

N. Pmcns, Pholo-lmmgnplvur, Washington. a q

UNITED STATES PATENT OFFICE.

THOMAS F. WELLS, OF WINCHESTER, MASSACHUSETTS, ASSIGNOR TO THE I MECHANICAL MANUFACTURING COMPANY, OF NASHUA, NEXV HAMP:

SHIRE.

POWER-WRENCH.

SPECIFICATION forming part of Letters Patent No. 410,129, dated August 27, 1889.

, Application filed January 9, 1889.

To all whom it may concern.-

Be it known that I, THOMAS F. WELLS, of Vinchester, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Power-Wrenches, of which the following, taken in connection with the accompanying drawings, is a specification. 1

The object of this invention is to providea 1o power-wrench for turning the nuts upon the fish-plates of railway-rail joints, which can be readily applied to use without attachment to the rail, which will permit the tightening of the nuts wrench-tight in asimple and effil5 cient manner after they have been screwed home, and which will permit an interchange of the wrench to suit nuts of diiferent sizes.

The accompanying drawings show the tool, Figure 1 being a view partly in elevation and partly in section; Fig. 2; an end View; and Fig. 3 is 'a' view in elevation of the wrench; Fig. 4, a perspective View of the adjustable wrench. I

In these several figures'the same letters refer to the same parts.

Referring to the drawings, A is the bedplate of the tool, which bed-plate is made of iron.

B B are two upright supports of iron for the crank or driving shaft C and the wrenchshaft D, which uprights are suitably secured to the bed-plate and are about four or five inches apart. These shafts are connected by any suitable form of gearing, and the upper shaft is provided with a crank-handle by which it is rotated. The shaft D projects through the support B, and upon this projecting end is a head H, which may be cast with the shaft or be firmly secured to the 46 same. The wrench I is secured to this head,

so as to be detachable therefrom.

K is the rail; L L, the fish-plates; M, the bolt, and N the nut on the same.

The socket a in the wrench I is adapted to the nuts usually used for fastening fish-plates. The wrench is rapidly rotated by the crank and gearing for putting on or taking off the Serial No. 295,913. (No model.)

nuts; but in order to loosen a tight nut or to make a nut wrench-tight it is desirable to provide means whereby power can be directly applied to the wrench-shaft with greater force than by means of the crank and gearing. Radial sockets at suitable distances apart are therefore provided in the head H for the reception of a hand-lever, by which power can be applied directly to the shaft to turn the wrench, so as to make the nut wrench-tight, or to loosen it when it is firmly fixed upon the bolt.

This feature of the invention-namely, providing the wrench or wrench-head with radial sockets-in combination with a lever inserti ble in said sockets, whereby great force can be exerted on the wrench or wrench-head as nearthe nut as possible, is not broadly claimed herein, said feature of the invention forming the subject-matter of a separate application filed by me July 1, 1889. By making the Wrench detachable from the head I am enabled by a single machine to suit shaft supported in said standards and provided with a head having radial lever-sock- V ets therein, a crank-shaft also supported on said standards above the wrench-shaft, gearing connecting said" shafts, adetachable.

wrench on said head, and a crank attached to the crank-sh aft.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 5th day of January, A. D. 1889. THOMAS F. ELLS.

itnesses: l

ALEX. L. HAYES, PHILIP H. FOLGER. 

